Pionic contribution in the Drell-Yan dilepton production cross section in p-Cu collision in the framework of the shell and Fermi gas models

TL;DR

This paper investigates how pionic contributions affect high-mass dilepton production in p-Cu collisions using shell and Fermi gas models, showing improved agreement with experimental data.

Contribution

It introduces the inclusion of pion quark distribution functions in nuclear models to better explain dilepton production cross sections in hadronic collisions.

Findings

Pionic contributions significantly improve theoretical predictions.

Results are consistent across shell and Fermi gas models.

Enhanced agreement with experimental data when pionic effects are considered.

Abstract

To investigate the high mass dilepton production cross section produced due to the Drell-Yan process in hadronic collisions such as nucleon- nucleus, the valence and sea quarks distribution functions inside nucleus is used. In this study, in the framework of the shell and Fermi gas models, by adding quarks distribution functions of pions inside nucleus besides the quarks distribution functions of bound nucleons, the changes in the dilepton production cross section were investigated. For this reason, pionic contribution in the structure function of 63Cunucleus and its EMC ratio was first studied using the aforementioned models. Then, in the framework of the Drell-Yan process using GRV's nucleons and pions quarks distribution functions, the high mass dilepton production cross section in p-cu collision was calculated and compared with the available experimental data. The extracted results, based on the two mentioned models, were greatly the same and by considering the pionic contribution, the theoretical results were consistent with the experimental data.